[PATCH v2 00/12] Implement generic prot_guest_has() helper function

[Tom Lendacky]

This patch series provides a generic helper function, prot_guest_has(),
to replace the sme_active(), sev_active(), sev_es_active() and
mem_encrypt_active() functions.

It is expected that as new protected virtualization technologies are
added to the kernel, they can all be covered by a single function call
instead of a collection of specific function calls all called from the
same locations.

The powerpc and s390 patches have been compile tested only. Can the
folks copied on this series verify that nothing breaks for them.

Cc: Andi Kleen <ak at linux.intel.com>
Cc: Andy Lutomirski <luto at kernel.org>
Cc: Ard Biesheuvel <ardb at kernel.org>
Cc: Baoquan He <bhe at redhat.com>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Borislav Petkov <bp at alien8.de>
Cc: Christian Borntraeger <borntraeger at de.ibm.com>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Dave Hansen <dave.hansen at linux.intel.com>
Cc: Dave Young <dyoung at redhat.com>
Cc: David Airlie <airlied at linux.ie>
Cc: Heiko Carstens <hca at linux.ibm.com>
Cc: Ingo Molnar <mingo at redhat.com>
Cc: Joerg Roedel <joro at 8bytes.org>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Peter Zijlstra <peterz at infradead.org>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Vasily Gorbik <gor at linux.ibm.com>
Cc: VMware Graphics <linux-graphics-maintainer at vmware.com>
Cc: Will Deacon <will at kernel.org>

---

Patches based on:
  https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git master
  0b52902cd2d9 ("Merge branch 'efi/urgent'")

Changes since v1:
- Move some arch ioremap functions within #ifdef CONFIG_AMD_MEM_ENCRYPT
  in prep for use of prot_guest_has() by TDX.
- Add type includes to the the protected_guest.h header file to prevent
  build errors outside of x86.
- Make amd_prot_guest_has() EXPORT_SYMBOL_GPL
- Use amd_prot_guest_has() in place of checking sme_me_mask in the
  arch/x86/mm/mem_encrypt.c file.

Tom Lendacky (12):
  x86/ioremap: Selectively build arch override encryption functions
  mm: Introduce a function to check for virtualization protection
    features
  x86/sev: Add an x86 version of prot_guest_has()
  powerpc/pseries/svm: Add a powerpc version of prot_guest_has()
  x86/sme: Replace occurrences of sme_active() with prot_guest_has()
  x86/sev: Replace occurrences of sev_active() with prot_guest_has()
  x86/sev: Replace occurrences of sev_es_active() with prot_guest_has()
  treewide: Replace the use of mem_encrypt_active() with
    prot_guest_has()
  mm: Remove the now unused mem_encrypt_active() function
  x86/sev: Remove the now unused mem_encrypt_active() function
  powerpc/pseries/svm: Remove the now unused mem_encrypt_active()
    function
  s390/mm: Remove the now unused mem_encrypt_active() function

 arch/Kconfig                               |  3 ++
 arch/powerpc/include/asm/mem_encrypt.h     |  5 --
 arch/powerpc/include/asm/protected_guest.h | 30 +++++++++++
 arch/powerpc/platforms/pseries/Kconfig     |  1 +
 arch/s390/include/asm/mem_encrypt.h        |  2 -
 arch/x86/Kconfig                           |  1 +
 arch/x86/include/asm/io.h                  |  8 +++
 arch/x86/include/asm/kexec.h               |  2 +-
 arch/x86/include/asm/mem_encrypt.h         | 13 +----
 arch/x86/include/asm/protected_guest.h     | 29 +++++++++++
 arch/x86/kernel/crash_dump_64.c            |  4 +-
 arch/x86/kernel/head64.c                   |  4 +-
 arch/x86/kernel/kvm.c                      |  3 +-
 arch/x86/kernel/kvmclock.c                 |  4 +-
 arch/x86/kernel/machine_kexec_64.c         | 19 +++----
 arch/x86/kernel/pci-swiotlb.c              |  9 ++--
 arch/x86/kernel/relocate_kernel_64.S       |  2 +-
 arch/x86/kernel/sev.c                      |  6 +--
 arch/x86/kvm/svm/svm.c                     |  3 +-
 arch/x86/mm/ioremap.c                      | 18 +++----
 arch/x86/mm/mem_encrypt.c                  | 60 +++++++++++++++-------
 arch/x86/mm/mem_encrypt_identity.c         |  3 +-
 arch/x86/mm/pat/set_memory.c               |  3 +-
 arch/x86/platform/efi/efi_64.c             |  9 ++--
 arch/x86/realmode/init.c                   |  8 +--
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  4 +-
 drivers/gpu/drm/drm_cache.c                |  4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c        |  4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_msg.c        |  6 +--
 drivers/iommu/amd/init.c                   |  7 +--
 drivers/iommu/amd/iommu.c                  |  3 +-
 drivers/iommu/amd/iommu_v2.c               |  3 +-
 drivers/iommu/iommu.c                      |  3 +-
 fs/proc/vmcore.c                           |  6 +--
 include/linux/mem_encrypt.h                |  4 --
 include/linux/protected_guest.h            | 40 +++++++++++++++
 kernel/dma/swiotlb.c                       |  4 +-
 37 files changed, 232 insertions(+), 105 deletions(-)
 create mode 100644 arch/powerpc/include/asm/protected_guest.h
 create mode 100644 arch/x86/include/asm/protected_guest.h
 create mode 100644 include/linux/protected_guest.h

-- 
2.32.0